thats why you mix it up. see ima have 2 1k lights on 12/12 so ima have one go on at 6am and turn off at 6pm and the other turn on at 6pm and off at 6 am.
The safest way to avoid power company noticing spikes and weird power patterns is to use flip floppers. Run your main wattage 24hr. If you run 4 1k lights, use 2 ballasts with flip floppers so there is no spike, every 12 hours it just switches rooms. Everything else and the veg room wouldnt be much of an issue after this. This way you can run 4 1k lights to flower, with a steady flow of 2k instead of 4kw spikes for 12 hours a day.
Digital meters are a bitch because they can detect spikes of 12/12 or 18/6 but chances are your flowering room lights will be your main power usage so if you can run them 24 hour and flip them theres no daily power spikes.
But the best thing to do is PAY ON TIME.